diff --git a/metricproviders/prometheus/prometheus.go b/metricproviders/prometheus/prometheus.go
index 45a657b9e4..66b621183e 100644
--- a/metricproviders/prometheus/prometheus.go
+++ b/metricproviders/prometheus/prometheus.go
@@ -171,9 +171,9 @@ func NewPrometheusAPI(metric v1alpha1.Metric) (v1.API, error) {
 	}
 	//Check if using Amazon Managed Prometheus if true build sigv4 client
 	if strings.Contains(metric.Provider.Prometheus.Address, "aps-workspaces") {
-		var cfg *sigv4.SigV4Config
+		var cfg sigv4.SigV4Config
 		var next http.RoundTripper
-		sigv4RoundTripper, err := sigv4.NewSigV4RoundTripper(cfg, next)
+		sigv4RoundTripper, err := sigv4.NewSigV4RoundTripper(&cfg, next)
 		if err != nil {
 			log.Errorf("Error creating SigV4 RoundTripper: %v", err)
 			return nil, err